//
// Forms
// --------------------------------------------------

// Normalize non-controls
//
// Restyle and baseline non-control form elements.

fieldset {
    padding: 0;
    margin: 0;
    border: 0;
    // Chrome and Firefox set a `min-width: min-content;` on fieldsets,
    // so we reset that to ensure it behaves more like a standard block element.
    // See https://github.com/twbs/bootstrap/issues/12359.
    min-width: 0;
}

legend {
    display: block;
    width: 100%;
    padding: 0;
    margin-bottom: @line-height-computed;
    font-size: (@font-size-base * 1.5);
    line-height: inherit;
    color: @legend-color;
    border: 0;
    border-bottom: 1px solid @legend-border-color;
}

label {
    display: inline-block;
    max-width: 100%; // Force IE8 to wrap long content (see https://github.com/twbs/bootstrap/issues/13141)
    margin-bottom: 5px;
    font-weight: bold;
}

// Normalize form controls
//
// While most of our form styles require extra classes, some basic normalization
// is required to ensure optimum display with or without those classes to better
// address browser inconsistencies.

// Override content-box in Normalize (* isn't specific enough)
input[type="search"] {
    .box-sizing(border-box);
}

// Position radios and checkboxes better
input[type="radio"],
input[type="checkbox"] {
    margin: 4px 0 0;
    margin-top: 1px \9; // IE8-9
    line-height: normal;
}

input[type="file"] {
    display: block;
}

// Make range inputs behave like textual form controls
input[type="range"] {
    display: block;
    width: 100%;
}

// Make multiple select elements height not fixed
select[multiple],
select[size] {
    height: auto;
}

// Focus for file, radio, and checkbox
input[type="file"]:focus,
input[type="radio"]:focus,
input[type="checkbox"]:focus {
    .tab-focus();
}

// Adjust output element
output {
    display: block;
    padding-top: (@padding-base-vertical + 1);
    font-size: @font-size-base;
    line-height: @line-height-base;
    color: @input-color;
}

// Common form controls
//
// Shared size and type resets for form controls. Apply `.form-control` to any
// of the following form controls:
//
// select
// textarea
// input[type="text"]
// input[type="password"]
// input[type="datetime"]
// input[type="datetime-local"]
// input[type="date"]
// input[type="month"]
// input[type="time"]
// input[type="week"]
// input[type="number"]
// input[type="email"]
// input[type="url"]
// input[type="search"]
// input[type="tel"]
// input[type="color"]

.form-control {
    display: block;
    width: 100%;
    height: @input-height-base; // Make inputs at least the height of their button counterpart (base line-height + padding + border)
    padding: @padding-base-vertical @padding-base-horizontal;
    font-size: @font-size-base;
    line-height: @line-height-base;
    color: @input-color;
    background-color: @input-bg;
    background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214

    z-index: 1;

    border: @form-control-border;

    // Note: This has no effect on <select>s in some browsers, due to the limited stylability of <select>s in CSS.
    & when not (@use-input-outline) {
        outline: none;
    }
    & when (@use-border-radius) {
        border-radius: @input-border-radius;
    }

    & when (@use-border-radius) {
        border-radius: 0;
    }

    // Customize the `:focus` state to imitate native WebKit styles.
    & when (@use-form-control-focus) {
        .form-control-focus();
        .transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
    }

    & when (@use-form-control-shadown) {
        .box-shadow(inset 0 1px 1px rgba(0, 0, 0, .075));
    }

    // Placeholder
    .placeholder();

    // Disabled and read-only inputs
    //
    // HTML5 says that controls under a fieldset > legend:first-child won't be
    // disabled if the fieldset is disabled. Due to implementation difficulty, we
    // don't honor that edge case; we style them as disabled anyway.
    &[disabled],
    &[readonly],
    fieldset[disabled] & {
        background-color: @input-bg-disabled;
        opacity: 1; // iOS fix for unreadable disabled content; see https://github.com/twbs/bootstrap/issues/11655
    }

    &[disabled],
    fieldset[disabled] & {
        cursor: @cursor-disabled;
    }

    // Reset height for `textarea`s
    textarea& {
        height: auto;
    }
}

.items-control {
    display: block;
    width: 100%;
    font-size: @font-size-base;
    line-height: @line-height-base;
    color: @input-color;
    background-color: @input-bg;
    background-image: none;
    .box-shadow(inset 0 1px 1px rgba(0, 0, 0, .075));
    .transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
    .form-control-focus();
    .placeholder();
    &[disabled],
    &[readonly],
    fieldset[disabled] & {
        background-color: @input-bg-disabled;
        opacity: 1;
    }

    &[disabled],
    fieldset[disabled] & {
        cursor: @cursor-disabled;
    }
    textarea& {
        height: auto;
    }
}

// Search inputs in iOS
//
// This overrides the extra rounded corners on search inputs in iOS so that our
// `.form-control` class can properly style them. Note that this cannot simply
// be added to `.form-control` as it's not specific enough. For details, see
// https://github.com/twbs/bootstrap/issues/11586.

input[type="search"] {
    -webkit-appearance: none;
}

// Special styles for iOS temporal inputs
//
// In Mobile Safari, setting `display: block` on temporal inputs causes the
// text within the input to become vertically misaligned. As a workaround, we
// set a pixel line-height that matches the given height of the input, but only
// for Safari. See https://bugs.webkit.org/show_bug.cgi?id=139848
//
// Note that as of 8.3, iOS doesn't support `datetime` or `week`.

@media screen and (-webkit-min-device-pixel-ratio: 0) {
    input[type="date"],
    input[type="time"],
    input[type="datetime-local"],
    input[type="month"] {
        &.form-control {
            line-height: @input-height-base;
        }

        &.input-sm,
        .input-group-sm & {
            line-height: @input-height-small;
        }

        &.input-lg,
        .input-group-lg & {
            line-height: @input-height-large;
        }
    }
}

// Form groups
//
// Designed to help with the organization and spacing of vertical forms. For
// horizontal forms, use the predefined grid classes.

.form-group {
    margin-bottom: @form-group-margin-bottom;
    position: relative;
}

// Checkboxes and radios
//
// Indent the labels to position radios/checkboxes as hanging controls.

div.radio,
div.checkbox {
    position: relative;
    display: block;
    margin-top: 10px;
    margin-bottom: 10px;

    label {
        min-height: @line-height-computed; // Ensure the input doesn't jump when there is no text
        padding-left: 20px;
        margin-bottom: 0;
        font-weight: normal;
        cursor: pointer;
        display: -webkit-flex;
        display: flex;
    }

    &:first-child {
        margin-top: 0;
    }

    &:last-child {
        margin-bottom: 0;
    }
}

.radio input[type="radio"],
.radio-inline input[type="radio"],
.checkbox input[type="checkbox"],
.checkbox-inline input[type="checkbox"] {
    position: absolute;
    margin-left: -20px;
    margin-top: 4px \9;
}

.radio + .radio,
.checkbox + .checkbox {
    margin-top: -5px; // Move up sibling radios or checkboxes for tighter spacing
}

// Radios and checkboxes on same line
.radio-inline,
.checkbox-inline {
    position: relative;
    display: inline-block;
    padding-left: 20px;
    margin-bottom: 0;
    vertical-align: middle;
    font-weight: normal;
    cursor: pointer;
}

.radio-inline + .radio-inline,
.checkbox-inline + .checkbox-inline {
    margin-top: 0;
    margin-left: 10px; // space out consecutive inline controls
}

// Apply same disabled cursor tweak as for inputs
// Some special care is needed because <label>s don't inherit their parent's `cursor`.
//
// Note: Neither radios nor checkboxes can be readonly.
input[type="radio"],
input[type="checkbox"] {
    &[disabled],
    &.disabled,
    fieldset[disabled] & {
        cursor: @cursor-disabled;
    }
}

// These classes are used directly on <label>s
.radio-inline,
.checkbox-inline {
    &.disabled,
    fieldset[disabled] & {
        cursor: @cursor-disabled;
    }
}

// These classes are used on elements with <label> descendants
.radio,
.checkbox {
    &.disabled,
    fieldset[disabled] & {
        label {
            cursor: @cursor-disabled;
        }
    }
}

// Static form control text
//
// Apply class to a `p` element to make any string of text align with labels in
// a horizontal form layout.

.form-control-static {
    // Size it appropriately next to real form controls
    padding-top: (@padding-base-vertical + 1);
    padding-bottom: (@padding-base-vertical + 1);
    // Remove default margin from `p`
    margin-bottom: 0;
    min-height: (@line-height-computed + @font-size-base);

    &.input-lg,
    &.input-sm {
        padding-left: 0;
        padding-right: 0;
    }
}

// Form control sizing
//
// Build on `.form-control` with modifier classes to decrease or increase the
// height and font-size of form controls.
//
// The `.form-group-* form-control` variations are sadly duplicated to avoid the
// issue documented in https://github.com/twbs/bootstrap/issues/15074.

.input-sm {
    .input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @input-border-radius-small);
}

.form-group-sm {
    .form-control {
        height: @input-height-small;
        padding: @padding-small-vertical @padding-small-horizontal;
        font-size: @font-size-small;
        line-height: @line-height-small;
        & when (@use-border-radius) {
            border-radius: @input-border-radius-small;
        }
    }
    select.form-control {
        height: @input-height-small;
        line-height: @input-height-small;
    }
    textarea.form-control,
    select[multiple].form-control {
        height: auto;
    }
    .form-control-static {
        height: @input-height-small;
        min-height: (@line-height-computed + @font-size-small);
        padding: (@padding-small-vertical + 1) @padding-small-horizontal;
        font-size: @font-size-small;
        line-height: @line-height-small;
    }
}

.input-lg {
    .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @input-border-radius-large);
}

.form-group-lg {
    .form-control {
        height: @input-height-large;
        padding: @padding-large-vertical @padding-large-horizontal;
        font-size: @font-size-large;
        line-height: @line-height-large;
        & when (@use-border-radius) {
            border-radius: @input-border-radius-large;
        }
    }
    select.form-control {
        height: @input-height-large;
        line-height: @input-height-large;
    }
    textarea.form-control,
    select[multiple].form-control {
        height: auto;
    }
    .form-control-static {
        height: @input-height-large;
        min-height: (@line-height-computed + @font-size-large);
        padding: (@padding-large-vertical + 1) @padding-large-horizontal;
        font-size: @font-size-large;
        line-height: @line-height-large;
    }
}

// Form control feedback states
//
// Apply contextual and semantic states to individual form controls.

.has-feedback {
    // Enable absolute positioning
    position: relative;

    // Ensure icons don't overlap text
    .form-control {
        padding-right: (@input-height-base * 1.25);
    }
}

// Feedback icon (requires .glyphicon classes)
.form-control-feedback {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 1; // Ensure icon is above input groups
    display: block;
    width: @input-height-base;
    height: @input-height-base;
    line-height: @input-height-base;
    text-align: center;
    pointer-events: none;
}

.input-lg + .form-control-feedback,
.input-group-lg + .form-control-feedback,
.form-group-lg .form-control + .form-control-feedback {
    width: @input-height-large;
    height: @input-height-large;
    line-height: @input-height-large;
}

.input-sm + .form-control-feedback,
.input-group-sm + .form-control-feedback,
.form-group-sm .form-control + .form-control-feedback {
    width: @input-height-small;
    height: @input-height-small;
    line-height: @input-height-small;
}

// Feedback states
.has-success {
    .form-control-validation(@state-success-text; @state-success-text; @state-success-bg);
}

.has-warning {
    .form-control-validation(@state-warning-text; @state-warning-text; @state-warning-bg);
}

.has-error {
    .form-control-validation(@state-danger-text; @state-danger-text; @state-danger-bg);
}

// Reposition feedback icon if input has visible label above
.has-feedback label {

    & ~ .form-control-feedback {
        top: (@line-height-computed + 5); // Height of the `label` and its margin
    }
    &.sr-only ~ .form-control-feedback {
        top: 0;
    }
}

// Help text
//
// Apply to any element you wish to create light text for placement immediately
// below a form control. Use for general help, formatting, or instructional text.

.help-block {
    display: block; // account for any element using help-block
    margin-top: 5px;
    margin-bottom: 10px;
    color: lighten(@text-color, 25%); // lighten the text some for contrast
}

// Inline forms
//
// Make forms appear inline(-block) by adding the `.form-inline` class. Inline
// forms begin stacked on extra small (mobile) devices and then go inline when
// viewports reach <768px.
//
// Requires wrapping inputs and labels with `.form-group` for proper display of
// default HTML form controls and our custom form controls (e.g., input groups).
//
// Heads up! This is mixin-ed into `.navbar-form` in navbars.less.

.form-inline {

    // Kick in the inline
    @media (min-width: @screen-sm-min) {
        // Inline-block all the things for "inline"
        .form-group {
            display: inline-block;
            margin-bottom: 0;
            vertical-align: middle;
        }

        // In navbar-form, allow folks to *not* use `.form-group`
        .form-control {
            display: inline-block;
            width: auto; // Prevent labels from stacking above inputs in `.form-group`
            vertical-align: middle;
        }

        // Make static controls behave like regular ones
        .form-control-static {
            display: inline-block;
        }

        .input-group {
            display: inline-table;
            vertical-align: middle;

            .input-group-addon,
            .input-group-btn,
            .form-control {
                width: auto;
            }
        }

        // Input groups need that 100% width though
        .input-group > .form-control {
            width: 100%;
        }

        .control-label {
            margin-bottom: 0;
            vertical-align: middle;
        }

        // Remove default margin on radios/checkboxes that were used for stacking, and
        // then undo the floating of radios and checkboxes to match.
        .radio,
        .checkbox {
            display: inline-block;
            margin-top: 0;
            margin-bottom: 0;
            vertical-align: middle;

            label {
                padding-left: 0;
            }
        }

        .radio input[type="radio"],
        .checkbox input[type="checkbox"] {
            position: relative;
            margin-left: 0;
        }

        // Re-override the feedback icon.
        .has-feedback .form-control-feedback {
            top: 0;
        }
    }
}

// Horizontal forms
//
// Horizontal forms are built on grid classes and allow you to create forms with
// labels on the left and inputs on the right.

.form-horizontal {

    // Consistent vertical alignment of radios and checkboxes
    //
    // Labels also get some reset styles, but that is scoped to a media query below.
    .radio,
    .checkbox,
    .radio-inline,
    .checkbox-inline {
        margin-top: 0;
        margin-bottom: 0;
        padding-top: (@padding-base-vertical + 1); // Default padding plus a border
    }
    // Account for padding we're adding to ensure the alignment and of help text
    // and other content below items
    .radio,
    .checkbox {
        min-height: (@line-height-computed + (@padding-base-vertical + 1));
    }

    // Make form groups behave like rows
    .form-group {
        .make-row();
    }

    // Reset spacing and right align labels, but scope to media queries so that
    // labels on narrow viewports stack the same as a default form example.
    @media (min-width: @screen-sm-min) {
        .control-label {
            text-align: right;
            margin-bottom: 0;
            padding-top: (@padding-base-vertical + 1); // Default padding plus a border
        }
    }

    // Validation states
    //
    // Reposition the icon because it's now within a grid column and columns have
    // `position: relative;` on them. Also accounts for the grid gutter padding.
    .has-feedback .form-control-feedback {
        right: floor((@grid-gutter-width / 2));
    }

    // Form group sizes
    //
    // Quick utility class for applying `.input-lg` and `.input-sm` styles to the
    // inputs and labels within a `.form-group`.
    .form-group-lg {
        @media (min-width: @screen-sm-min) {
            .control-label {
                padding-top: ((@padding-large-vertical * @line-height-large) + 1);
                font-size: @font-size-large;
            }
        }
    }
    .form-group-sm {
        @media (min-width: @screen-sm-min) {
            .control-label {
                padding-top: (@padding-small-vertical + 1);
                font-size: @font-size-small;
            }
        }
    }
}
